18911167414271 has 4 divisors (see below), whose sum is σ = 20630364451944. Its totient is φ = 17191970376600.

The previous prime is 18911167414199. The next prime is 18911167414273. The reversal of 18911167414271 is 17241476111981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18911167414271 - 2¹⁰ = 18911167413247 is a prime.

It is a super-2 number, since 2×18911167414271² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18911167414273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 859598518820 + ... + 859598518841.

It is an arithmetic number, because the mean of its divisors is an integer number (5157591112986).

Almost surely, 2^{18911167414271} is an apocalyptic number.

18911167414271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18911167414271 is a deficient number, since it is larger than the sum of its proper divisors (1719197037673).

18911167414271 is a wasteful number, since it uses less digits than its factorization.

18911167414271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719197037672.

The product of its digits is 677376, while the sum is 53.

The spelling of 18911167414271 in words is "eighteen trillion, nine hundred eleven billion, one hundred sixty-seven million, four hundred fourteen thousand, two hundred seventy-one".